Data for: Richness, food webs structures and ecosystem functioning

This dataset has information on the spatial distribution of fish species from the middle Paraná River and the diet information of 15 fish-eating species. The objective of the paper was to evaluate the relationship between richness, the structure of food webs and standing biomass. In addition to the information on diet and spatial distribution, there is a readme file, two Rstudio scripts and an R environment (all the results of the work can be found in the latter)., The methodology was extracted from  (DOI: 10.1111/1365-2656.13784)
Fishes were sampled from 27 water bodies (Figure 1) grouped in four habitat types according to their flow, size and connectivity: major rivers, secondary channels, connected lakes and isolated lakes. The major rivers consisted of lotic environments that had an average width between 330 and 1,100 m. The secondary channels had an average channel width between 28 and 137 m, and meandered among the floodplain islands. The connected lakes were lentic environments that had a permanent connection with the smaller and larger channels and had a surface area between 3.4 and 240 ha and a depth between 0.7 and 3.1 m at average water level. The isolated lakes consisted of lentic environments whose connection with the channels was interrupted throughout the hydrological period and presented areas between 4.1 and 40.1 ha. Given that ecological communities of the Paraná River floodplain vary at multiple spatial and temporal scales, it i..., Rstudio is necessary to open the scripts and be able to visualize the objects.